| Postcode area | Postcode area name[1][3] | Code formation | Number of postcode districts within area |
|---|---|---|---|
| AB | Aberdeen | 33 (Highest number 56) | |
| AL | St Albans | 10 | |
| B | Birmingham | 79 (Highest number 98) | |
| BA | Bath | 19 (Highest number 22) | |
| BB | Blackburn | 13 (Highest number 18) | |
| BD | Bradford | 27 (Highest number 99) | |
| BH | Bournemouth | 26 (Highest number 31) | |
| BL | Bolton | 10 (Highest number 9) | |
| BN | Brighton | 30 (Highest number 45) | |
| BR | Bromley | 8 | |
| BS | Bristol | 37 (Highest number 49) | |
| BT | Belfast | 81 (Highest number 94) | |
| CA | Carlisle | 28 | |
| CB | Cambridge | 16 (Highest number 25) | |
| CF | Cardiff | 35 (Highest number 83) | |
| CH | Chester | 37 (Highest number 66) | |
| CM | Chelmsford | 25 (Highest number 77) | |
| CO | Colchester | 16 | |
| CR | Croydon | 8 | |
| CT | Canterbury | 21 | |
| CV | Coventry | 24 (Highest number 47) | |
| CW | Crewe | 12 | |
| DA | Dartford | 18 | |
| DD | Dundee | 11 | |
| DE | Derby | 23 (Highest number 75) | |
| DG | Dumfries[1] | Dumfries and Galloway | 15 (Highest number 16) |
| DH | Durham | 9 | |
| DL | Darlington | 17 | |
| DN | Doncaster | 32 (Highest number 41) | |
| DT | Dorchester | 11 | |
| DY | Dudley | 14 | |
| E | East London | 20 (Includes E1W) | |
| EC | East Central London | 23 (Layout for EC is different, e.g.: EC2R 8AH, highest number 4/4Y) | |
| EH | Edinburgh | 54 (Highest number 55) | |
| EN | Enfield | 11 | |
| EX | Exeter | 33 (Highest number 39) | |
| FK | Falkirk | 21 | |
| FY | Blackpool[1] | The Fylde | 8 |
| G | Glasgow | 52 (Highest number 84) | |
| GL | Gloucester | 27 (Highest number 56) | |
| GU | Guildford | 38 (Highest number 52) | |
| HA | Harrow | 10 (Highest number 9) | |
| HD | Huddersfield | 9 | |
| HG | Harrogate | 5 | |
| HP | Hemel Hempstead | 24 (Highest number 27) | |
| HR | Hereford | 9 | |
| HS | Hebrides | 9 | |
| HU | Hull | 20 | |
| HX | Halifax | 7 | |
| IG | Ilford | Possibly Ilford and Gants Hill (or Barking) | 11 |
| IP | Ipswich | 33 | |
| IV | Inverness | 52 (Highest number 63) | |
| KA | Kilmarnock | Possibly Kilmarnock and Ayr or Kilmarnock | 30 |
| KT | Kingston upon Thames | 24 | |
| KW | Kirkwall | 16 (Highest number 17) | |
| KY | Kirkcaldy | 16 | |
| L | Liverpool | 40 | |
| LA | Lancaster | 23 | |
| LD | Llandrindod Wells[1] | 8 | |
| LE | Leicester | 21 (Highest number 67) | |
| LL | Llandudno | 67 (Highest number 78) | |
| LN | Lincoln | 13 | |
| LS | Leeds | 29 | |
| LU | Luton | 7 | |
| M | Manchester | 43 (Highest number 90) | |
| ME | Medway | 20 | |
| MK | Milton Keynes | 26 (Highest number 46) | |
| ML | Motherwell | 12 | |
| N | North London | 23 (Includes N1C, Highest number 22) | |
| NE | Newcastle upon Tyne[4][5] | 61 (Highest number 71) | |
| NG | Nottingham | 29 (Highest number 34) | |
| NN | Northampton | 19 (Highest number 29) | |
| NP | Newport | 18 (Highest number 44) | |
| NR | Norwich | 35 | |
| NW | North West London | 11 | |
| OL | Oldham | 16 | |
| OX | Oxford | 27 (Highest number 49) | |
| PA | Paisley | 67 (Highest number 80) | |
| PE | Peterborough | 38 | |
| PH | Perth | 43 (Highest number 50) | |
| PL | Plymouth | 35 | |
| PO | Portsmouth | 34 (Highest number 41) | |
| PR | Preston | 11 (Highest number 26) | |
| RG | Reading | 30 (Highest number 45) | |
| RH | Redhill | 20 | |
| RM | Romford | 20 | |
| S | Sheffield | 45 (Highest number 81) | |
| SA | Swansea | 51 (Highest number 73) | |
| SE | South East London | 28 | |
| SG | Stevenage | 19 | |
| SK | Stockport | 19 (Highest number 23) | |
| SL | Slough | 10 (Highest number 9) | |
| SM | Sutton[1] | Possibly Sutton and Morden, the two post towns that are within the SM area [6] | 7 |
| SN | Swindon | 18 (Highest number 26) | |
| SO | Southampton | 23 (Highest number 53) | |
| SP | Salisbury | Salisbury Plain | 11 |
| SR | Sunderland | 8 | |
| SS | Southend-on-Sea | 17 | |
| ST | Stoke-on-Trent | 21 | |
| SW | South West London | 27 (SW1 is represented by SW1A, -E, -H, -P, -V, -W, -X & -Y, Highest number 20) | |
| SY | Shrewsbury | 25 | |
| TA | Taunton | 24 | |
| TD | Galashiels | Tweeddale | 15 |
| TF | Telford | 13 | |
| TN | Tunbridge Wells[1] | 40 | |
| TQ | Torquay | 14 | |
| TR | Truro | 27 | |
| TS | Teesside | 29 | |
| TW | Twickenham | 20 | |
| UB | Southall[1] | Uxbridge | 11 |
| W | West London | 26 (W1 is split into W1A to W1D, -F to -H, -J, -K, -S to -U and -W, highest number 14) | |
| WA | Warrington | 16 | |
| WC | West Central London | 14 (WC1 is split into eight, WC2 is split into six, highest number 2/2R) | |
| WD | Watford | 11 (Highest number 25) | |
| WF | Wakefield | 17 | |
| WN | Wigan | 8 | |
| WR | Worcester | 15 | |
| WS | Walsall | 15 | |
| WV | Wolverhampton | 16 | |
| YO | York | 29 (Highest number 47) | |
| ZE | Lerwick[1] | Zetland | 3 |
Example postcode in the United Kingdom
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